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Transformer substation earthing system

A grounding system and substation technology, applied in the field of lightning protection and grounding, can solve the problems of interference with the ground potential of weak current equipment, interference of weak current equipment, insufficient equipment operation and protection, etc., so as to reduce the probability of ground potential counterattack and ensure normal operation.

Inactive Publication Date: 2012-12-19
SHENZHEN POWER SUPPLY BUREAU +1
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AI Technical Summary

Problems solved by technology

[0004] However, such a grounding system is not sufficient for the operation and protection of the equipment in the communication room. The local potential difference will interfere with the ground potential of the weak current equipment; when the lightning current enters the main ground body by directly striking the lightning rod, it may form a counterattack of the ground potential, causing interference or damage to the weak current equipment

Method used

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  • Transformer substation earthing system
  • Transformer substation earthing system
  • Transformer substation earthing system

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Embodiment Construction

[0016] The content of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Such as image 3 , Figure 4 As shown, the grounding system of this embodiment includes: main grounding body 1, direct lightning strike lightning rod 2, complex building building lightning protection body 3, in-building grounding line network 4 set in the complex building, strong current equipment grounding loop 5, weak current The equipment grounding loop 6, the weak current grounding down conductor 7, the weak current grounding body 8 and the grounding connection body 9.

[0018] Wherein, the weak current equipment grounding loop 6 in this embodiment refers to the grounding loops arranged in the communication equipment room, the first communication power supply room, the first battery room, the second communication power supply room and the second battery room.

[0019] Such as Figure 4 As shown, the grounding loop 6 of the w...

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Abstract

The invention provides an earthing system for solving the problem of ground potential counterattack or electromagnetic crosstalk generated by a main earthing body possibly existing a transformer substation to a communication earthing loop. The earthing system comprises a main earthing body, a direct lightning stroke lightning conductor, a comprehensive building lightning protection body, an in-building earthing line net arranged in a comprehensive building, a heavy current installation earthing loop and a weak current installation earthing loop, especially, the earthing system also comprises a weak current earthing leading bus, a weak current earthing body and an earthing connecting body, wherein the weak current installation earthing loop is not connected with the in-building earthing line net; the weak current installation earthing loop, the weak current earthing leaking bus and the weak current earthing body are sequentially connected; one end of the earthing connecting body is connected with the main earthing body, the other end of the earthing connecting body is connected with the weak current earthing body through an equipotential connector; the minimum distance between the weak current earthing body and the main earthing body is not less than 15m; and the weak current earthing leading bus is a high-voltage insulation line. The invention can ensure normal operation of a communication device in the transformer substation.

Description

technical field [0001] The invention belongs to the field of lightning protection and grounding, and in particular relates to a grounding system capable of solving the problems of ground potential backlash and electromagnetic crosstalk for weak current equipment in substations. Background technique [0002] The existing substation grounding system includes: the main grounding (grid) body, the direct lightning strike lightning rod, the complex building lightning protection body and the grounding line network inside the building. Among them, the grounding line network in the building is connected to the grounding loop including the grounding loop of the strong current equipment and the grounding loop of the weak current equipment. The ground loop of heavy current equipment refers to the ground loop set in the relay room, GIS room and other rooms mainly equipped with strong current equipment. The ground loop of weak current equipment refers to the ground loop set in the commun...

Claims

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Application Information

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IPC IPC(8): H02B5/01
Inventor 丘国良田志峰高强陈杰邱续东
Owner SHENZHEN POWER SUPPLY BUREAU
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